used  1905 (1 Oct.) No watermark $2½. greenish black and red, (25x16 holes) centred a little to foot, cancelled by "TSINGTAU" single ring d.s. (3 10.05). Fine and very scarce. Signed Pfenninger and Bühler. M. 27B; D.M. 10,000. Photo
used 1905 (1 Oct.) No watermark $2½. greenish black and red, (25x16 holes) centred a little to foot, cancelled by "TSINGTAU" single ring d.s. (3 10.05). Fine and very scarce. Signed Pfenninger and Bühler. M. 27B; D.M. 10,000. Photo

Details
used 1905 (1 Oct.) No watermark $2½. greenish black and red, (25x16 holes) centred a little to foot, cancelled by "TSINGTAU" single ring d.s. (3 10.05). Fine and very scarce. Signed Pfenninger and Bühler. M. 27B; D.M. 10,000. Photo